There was a fairly recent patch where Supply Box Drops from players were increased and/or fixed.
Ever since that patch there's been an increased occurrence of Supplies spawning in the worst possible locations during fights, especially during certain funnel battles, blocking players from moving, getting stuck or completely unable to enter certain funnels even, due to narrow doorways and floating supply boxes in the air blocking any entrance.
If possible I'd suggest removing collision from Supply Boxes completely, otherwise if not possible, then player drops should be completely disabled as this mechanic is unintentionally griefing proper gameplay, and in a non-immersive or logical way.
